Home / 13,900.72-20,836.50-10,197.40

Finding the Fourth Proportional to 13,900.72, 20,836.50 and 10,197.40

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Solution

The fourth proportional to 13,900.72, 20,836.50 and 10,197.40 is: 15,285.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,900.72 : 20,836.50 = 10,197.40 : x
  2. Step 2: Convert to fraction form
    13,900.72/20,836.50 = 10,197.40/x
  3. Step 3: Cross multiply
    13,900.72x = 20,836.50 × 10,197.40
  4. Step 4: Simplify right side
    13,900.72x = 212,478,125.10
  5. Step 5: Solve for x
    x = 212,478,125.10/13,900.72
  6. Step 6: Final answer
    x = 15,285.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.